Halo games after 1: i like FPS but i just didn't like these. Played 2,3, and ODST (all by rental, because I enjoyed 1)but haven't played reach yet. But i don't think I will.
Metal Gear Solid: Again, i don't mind sneaking around, but the convoluted story and (in my opinion) the horrible controls ruin it.
Final Fantasy XII: I can stand XIII better than this. My friend played it and I got to see the all of the cutscenes, and the story is wonderful! But the gameplay was just boring
Final Fantasy VIII: See above
Oblivion & Morrowind: made a class, played for quite a while, and it was fun. At first. But the whole continent felt...detached and unpopulated. I saw more people wandering around in fallout and that was after a nuclear apocalypse!
MMO's: If im really bored, sure ill play a free one. But i tried out WoW on a trial and have played dozens of free one's at the request of my gf who loves them but I just find then boring after a while. I honestly don't see why anyone pays for WoW.